Recently, Noctua released some updates to the NF-P14 fan in the form of not one, but three new models; the NF-A15 PWM, NF-A14 ULN and NF-A14 FLX. Each fan offers something slightly different than the other, such as the ability to mount in 120mm vs. 140mm fan mounting holes, or different speed/silence options. I was a big fan of the original NF-P14, which still sees use on my CPU cooler today, so I have high expectations that these new fans will bring me some noticeable upgrades to the series."

FULL STORY @ DREAMWARECOMPUTERS.COM(http://www.dreamwarecomputers.com/index.php/reviews/5-cooling/27062-noctua-nf-a14-and-nf-a15-premium-silent-fans)